Missing ignore rules for non-coding files (README, LICENSE, .gitignore, etc.)

[whaiman]

Title
No ignore mechanism for non-source files skews project statistics

Description

DevLedger currently records activity for all files without distinction.

This leads to distorted statistics when working with files such as:

• README.md
• LICENSE
• .gitignore
• generated YAML/CI files
• configuration files
• documentation files

Editing or generating these files contributes to:

• total coding time
• language statistics
• behavior analysis

This produces misleading reports, especially for small projects where documentation or config edits can dominate the stats.

Why this matters

DevLedger aims to provide a reliable representation of coding activity.
Including non-source and generated files pollutes:

• per-language metrics
• time distribution
• behavior analysis signals

For example, generating or editing a large README can appear as significant Markdown “coding time”.

Expected behavior

DevLedger should support an ignore mechanism similar to .gitignore, for example:

.devledgerignore

Example:

README.md
LICENSE
.gitignore
*.yml
*.yaml
docs/**

These files should be excluded from:

• time tracking
• language stats
• behavior analysis

Acceptance criteria

• Support for .devledgerignore
• Glob pattern matching
• Ignored files do not produce events for aggregation
• Default built-in ignore list for common non-source files (README, LICENSE, etc.)