Improved library search

[cmaglie]

Please check if the PR fulfills these requirements

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• The PR follows
  our contributing guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• UPGRADING.md has been updated with a migration guide (for breaking changes)

• What kind of change does this PR introduce?
  Applied some changes to extend the matching libraries found by a query:
  1. Library search is now done by looking also into libraries author and providedIncludes.
  2. The query string is split into words so the search for aaa bbb will match even if aaa and bbb are not found together (as a single stirng aaa bbb)
  3. Non-alphanumeric characters (excluding :) are translated into spaces before splitting the query into words.

• What is the current behavior?
  See:
  core/lib search results must be the same as from the IDE 1.x #1895
  Add author field to library search scope #1894
  Add providesIncludes field to library search scope #1893

• What is the new behavior?
  All the above issues are fixed.

• Does this PR introduce a breaking change, and is
  titled accordingly?
  No

• Other information:
  Fix core/lib search results must be the same as from the IDE 1.x #1895, Add author field to library search scope #1894, Add providesIncludes field to library search scope #1893

[codecov]

Codecov Report

Base: 36.58% // Head: 36.69% // Increases project coverage by +0.10% 🎉

Coverage data is based on head (d4a03de) compared to base (5730e2e).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1896      +/-   ##
==========================================
+ Coverage   36.58%   36.69%   +0.10%     
==========================================
  Files         231      231              
  Lines       19696    19719      +23     
==========================================
+ Hits         7206     7235      +29     
+ Misses      11659    11654       -5     
+ Partials      831      830       -1     

Flag	Coverage Δ
unit	36.69% <100.00%> (+0.10%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
commands/lib/search.go	92.50% <100.00%> (+12.83%)	⬆️
internal/integrationtest/arduino-cli.go	85.45% <100.00%> (+0.10%)	⬆️

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[umbynos]

code LGTM

[kittaakos]

@cmaglie, are you planning to update this PR with the board search equivalent or not? If not, I will do manual verification and compare the lib search behavior with IDE 1.x. Otherwise, I will wait for the update. Thank you!

[cmaglie]

Not in this PR, I'm working on other tasks, let's start with libraries which is the most common scenario, I will open another PR for the platform search.

[kittaakos]

I have downloaded the CLI for macOS and manually compared dozens of search results with the Library manager from IDE 1.x. It's working great. Excellent job.