Fix plugin descriptor loading and change default port to 8080

[Copilot]

PyCharm fails to load the plugin descriptor from the built ZIP due to naming inconsistencies between the archive and internal plugin structure. Additionally, this PR standardizes the default port to 8080 across the entire codebase.

Changes

• Removed manual archiveBaseName override in buildPlugin task - This bypasses IntelliJ Platform Gradle Plugin's standard naming conventions and causes structural mismatches
• Added settings.gradle.kts with rootProject.name = "intellij-plugin" - Project name now controls artifact naming through Gradle's standard mechanism
• Changed all default ports from 8000 to 8080 - Updated Python backend, Kotlin plugin, and documentation to use port 8080 consistently

The IntelliJ Platform Gradle Plugin 2.x requires project name (not archiveBaseName) to determine plugin structure. The built artifact remains intellij-plugin-{version}.zip but with correct internal structure for PyCharm installation.

Plugin Descriptor Fix

// build.gradle.kts - Removed:
buildPlugin {
    archiveBaseName.set("intellij-plugin")
}

// settings.gradle.kts - Added:
rootProject.name = "intellij-plugin"

Port Changes

Updated default port from 8000 to 8080 in:

• utils/config.py - Default UVICORN_PORT environment variable fallback
• main.py - Fallback default port in uvicorn.run()
• ide-plugins/src/main/kotlin/com/picocode/PicoCodeSettings.kt - Default serverPort in plugin settings
• ide-plugins/src/main/kotlin/com/picocode/PicoCodeConfigurable.kt - Fallback default port in plugin configuration
• REST_API.md - Updated all documentation examples to use port 8080

[!WARNING]

Original prompt

Fail to load plugin descriptor from file intellij-plugin-0.0.1-test.zip when installing the plugin on pycharm, maybe because the file inside the package not have the same filename??

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[Mte90]

@copilot I want also that you change all the default port in all the codebase to 8080

[Copilot]

@copilot I want also that you change all the default port in all the codebase to 8080

Changed all default ports from 8000 to 8080 across the entire codebase. Updated:

• Python backend (utils/config.py, main.py)
• Kotlin plugin (PicoCodeSettings.kt, PicoCodeConfigurable.kt)
• Documentation (REST_API.md)

Commit: 2c17cba