Update UnitTestBot Go docs (#2283)

* Update Go docs

* Fix remarks

Author: egiptipavel

docs/GoSupport.md

@@ -5,7 +5,7 @@ UnitTestBot Go automatically generates ready-to-use unit tests for Go programs.
 With UnitTestBot Go, you can find bugs in your code and fixate the desired program behavior with less effort.
 
 The project is under development,
-so feel free to [contribute](https://github.com/UnitTestBot/UTBotJava/blob/main/utbot-go/docs/DEVELOPERS_GUIDE.md).
+so feel free to [contribute](https://github.com/UnitTestBot/UTBotJava/blob/main/utbot-go/docs/DEVELOPER_GUIDE.md).
 
 ## Features and details
 
@@ -15,14 +15,14 @@ inserts these values into the user functions, and executes the resulting test ca
 
 ### Supported types for function parameters
 
-Now UnitTestBot Go can generate values for _primitive types_, _arrays_, _slices_ and _structs_.
+Now UnitTestBot Go can generate values for _primitive types_, _arrays_, _slices_, _maps_, _structs_, _channels_, _interfaces_, and _pointers_.
 
 For _floating point types_, UnitTestBot Go supports working with _infinity_ and _NaN_.
 
 ### Supported types for the returned results
 
 For the returned function results,
-UnitTestBot Go supports the `error` type as well as all the types supported for the function parameters.
+UnitTestBot Go supports the `error` type as well as all the types supported for the function parameters except _interfaces_ and _channels_.
 
 It also captures `panic` cases correctly.
 
@@ -85,7 +85,7 @@ Please refer to [UnitTestBot user guide](https://github.com/UnitTestBot/UTBotJav
 
 ### Requirements
 
-* Java SDK 11 or later
+* Java SDK 17 or later
 * Go SDK 1.18 or later
 * Properly configured `go.mod` file for the code under test
 * GCC and `github.com/stretchr/testify/assert` installed
@@ -113,15 +113,18 @@ java -jar utbot-cli-2022.8-beta.jar runGo --help
 `generateGo` options:
 
 * `-s, --source TEXT`, _required_: specifies a Go source file to generate tests for.
-* `-f, --function TEXT`, _required_: specifies a function name to generate tests for. Can be used multiple times to select multiple
-  functions.
-* `-go, --go-path TEXT`, _required_: specifies a path to a Go executable. For example, `/usr/local/go/bin/go`.
+* `-f, --function TEXT`: specifies a function name to generate tests for. Can be used multiple times to select multiple functions.
+* `-m, --method TEXT`: specifies a method name to generate tests for. Can be used multiple times to select multiple methods. 
+* `-go TEXT`, _required_: specifies a path to a Go executable. For example, `/usr/local/go/bin/go`.
+* `-gopath TEXT`, _required_: specifies a path to your workspace location. It defaults to a directory named `go` in your home directory: `$HOME/go` for Unix, `$home/go` for Plan 9, and `%USERPROFILE%\go` (usually `C:\Users\YourName\go`) for Windows.
+* `-parallel INT`: specifies the number of fuzzing processes running at once (eight by default).
 * `-et, --each-execution-timeout INT`: specifies a timeout in milliseconds for each target function execution.
   The default timeout is 1,000 ms.
 * `-at, --all-execution-timeout INT`: specifies a timeout in milliseconds for all target function executions.
   The default timeout is 60,000 ms.
 * `-p, --print-test`: specifies whether a test should be printed out to `StdOut`. Disabled by default.
 * `-w, --overwrite`: specifies whether to overwrite the output test file if it already exists. Disabled by default.
+* `-fm, --fuzzing-mode`: stops test generation when a `panic` situation, an error, or timeout occurs (only one test will be generated for one of these cases).
 * `-h, --help`: shows a help message and exits.
 
 `runGo` options:

utbot-go/docs/DEVELOPER_GUIDE.md

@@ -9,41 +9,45 @@ flowchart TB
     A["Target selection and configuration (IntelliJ IDEA plugin or CLI)"]:::someclass --> B(Go source code analysis)
     classDef someclass fill:#b810
 
-    B --> C(Fuzzing)
-    C --> D(Executing functions)
-    D --> E(Getting results)
-    E --> C
-    C ---> F(Test file generation)
+    B --> C(Code instrumentation)
+    C --> D(Generation of arguments)
+    D --> E(Executing functions)
+    E --> F(Getting results)
+    F --> D
+    D ---> G(Test file generation)
 ```
 
 ### Target selection and configuration
 
 A user manually selects the target source file and functions to generate the tests for.
 Test generation settings are also configured manually.
 
+### Code instrumentation
+
+After each line in a function, UnitTestBot Go adds logging about this line traversal during the execution.
+
 ### Go source code analysis
 
-UnitTestBot Go collects information about the target functions:
-* signatures and type information (in the basic version);
-* constants in the function bodies (to be implemented).
+UnitTestBot Go gains information about the `int` or `uint` value size in bits, and information about the target functions:
+* signatures and type information;
+* constants in the function bodies.
 
 As a result, UnitTestBot Go gets an internal
 representation of the target functions.
 
-### Fuzzing
+### Generation of arguments
 
-During the fuzzing stage, UnitTestBot Go generates the input values for the source code.
+At this stage, UnitTestBot Go generates the input values for the target functions.
 
 ### Executing target functions
 
-UnitTestBot Go executes the target functions with the generated values as arguments and analyses the result
-to continue or stop the generation process.
+UnitTestBot Go executes the target functions with the generated values as arguments.
 
 ### Getting results
 
 The result of target function execution is sent to the fuzzer for analysis:
 coverage rate information guides the following value generation process.
-Based on this feedback,
+Based on remaining time, 
 the fuzzer decides whether it should continue or stop generating input values.
 
 ### Test code generation