docs: Add further notes to contributing guide

• Added note on what files are created after intalling `forc` and `fuel-core`
• Added a note that resolves the issue that arises when using standard binaries
but it uses the previously downloaded binaries.

CONTRIBUTING.md

@@ -43,6 +43,18 @@ pnpm install
 pnpm build
 ```
 
+# Files and Directories Created After Installation
+
+After running `pnpm install` and `pnpm build`, the following files and directories are created:
+
+- Forc Repository:
+  - Located at `internal/forc/sway-repo`.
+  - Contains the source code for the version of `forc` you are using.
+
+- Fuel-Core Repository:
+  - Located at `internal/fuel-core/fuel-core-repo`.
+  - Contains the source code for the version of `fuel-core` you are using.
+
 # Developing
 
 For building everything in watch-mode, run:
@@ -118,12 +130,11 @@ When you need to work with unreleased versions of `forc` or `fuel-core`, you can
 To use an unreleased version of `forc`:
 
 1. **Edit the `VERSION` File**
-Open the `packages/forc/VERSION` file and replace the version number (e.g., 0.59.0) with the desired git branch:
+Open the `internal/forc/VERSION` file and replace the version number (e.g., 0.59.0) with the desired git branch:
 
-    ```bash
+    ```text
     git:some/branch-name
     ```
-
 1. **Install and Build**
 To download and build `forc` from the specified branch after updating `VERSION` file, run:
 
@@ -132,17 +143,18 @@ To download and build `forc` from the specified branch after updating `VERSION`
     pnpm build
     ```
 
+The following directory will be updated or created: `internal/forc/sway-repo`
+
 ## Using Unreleased Fuel-Core
 
 Similarly, to use an unreleased version of `fuel-core`:
 
 1. **Edit the `VERSION` file:**
-Open the packages/fuel-core/VERSION file and replace the version number with the desired git branch:
+Open the `internal/fuel-core/VERSION` file and replace the version number with the desired git branch:
 
-    ```bash
+    ```text
     git:some/branch-name
     ```
-
 1. **Install and Build**
 To download and build `fuel-core` from the specified branch after updating `VERSION` file, run:
 
@@ -151,6 +163,29 @@ To download and build `fuel-core` from the specified branch after updating `VERS
     pnpm build
     ```
 
+The following directory will be updated or created: `internal/fuel-core/fuel-core-repo`
+
+# Switching Back to Standard Binaries
+
+If you switch back to using standard binaries you might encounter issues where the SDK still uses the previously downloaded unreleased binaries.
+
+
+## Resolving the Issue
+
+To resolve the issue and ensure the SDK uses the correct binaries:
+
+1. **Delete the downloaded repositories**
+
+    ```sh
+    rm -rf internal/forc/sway-repo
+    rm -rf internal/fuel-core/fuel-core-repo
+    ```
+1. **Reinstall and build.**
+    ```sh
+    pnpm install
+    pnpm build
+    ```
+
 # Testing
 
 In order to run tests locally, you can run the following commands: