Replace page classifier with dit, add -fpt flag

[dogancanbakir]

Proposed changes

Replace built-in Naive Bayes page classifier with dit (20 page types, 8 form types, 79 field types). Add -fpt/-filter-page-type flag for filtering by any page type(s). Deprecate -fep as alias for -fpt error.

• Replace common/pagetypeclassifier/ with dit.Classifier
• Add -fpt flag (e.g. -fpt login,captcha,parked)
• Deprecate -fep with info message
• KnowledgeBase now includes Forms with form type and field classifications
• Bump Go to 1.25.7, update CI/CD workflows and Dockerfile

Closes #2403

Proof

• httpx -u https://github.com/login -json — KnowledgeBase shows PageType: login + Forms
• -fpt login filters login pages, -fpt error filters error pages
• -fpt login,error filters multiple types, case-insensitive
• -fep backward compat filters error pages + shows deprecation message
• go build ./... and go test ./... pass

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Summary by CodeRabbit

• Chores

  • Bumped Go toolchain to 1.25.7 and updated base builder image; refreshed dependency set.

• New Features

  • Added -fpt / --filter-page-type flag to filter output by page type.

• Deprecations

  • Deprecated -fep / --filter-error-page; retained for backward compatibility with a deprecation notice.

• Removals

  • Removed the previous page-type classifier, its dataset, and associated tests.

• Documentation

  • README updated with new flag examples and Go requirement.