Remove IO dependency

[limakzi]

Closes #33. Builds are fixed in #35.

[Copilot]

Pull request overview

Removes the remaining external/network I/O dependency from UnitLib by dropping the IO package requirement and deleting the code path that attempted to fetch order-243 data remotely, aligning behavior with the bundled library data.

Changes:

• Removed IO from NeededOtherPackages in PackageInfo.g.
• Deleted the SingleHTTPRequest-based remote fetch path for n=243 and adjusted the boundary condition to treat 243 as bundled.
• Updated the manual to state that order-243 data is included in the distribution.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
PackageInfo.g	Removes the IO package dependency from declared requirements.
lib/unitlib.g	Removes remote download logic for n=243 and adjusts the availability boundary condition.
doc/intro.xml	Updates installation/library wording to reflect bundled data up to and including 243.

Comments suppressed due to low confidence (1)

lib/unitlib.g:23

• This PR changes the boundary behavior for n=243 (removes the remote fetch path and treats 243 as bundled), but the test suite does not exercise PcNormalizedUnitGroupSmallGroup(243, ...) at all. Add at least one test case that loads an order-243 entry to prevent regressions and to ensure no network access is required.

if n > 243 then
  Print( "WARNING : the library of V(KG) for groups of order ", n, 
         " is not available yet !!! \n", 
	 "You can use only groups from the unitlib/userdata directory \n",
	 "in case if you already computed their descriptions \n",

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 36.32%. Comparing base (c34e0e7) to head (3713218).

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #34      +/-   ##
==========================================
+ Coverage   35.31%   36.32%   +1.00%     
==========================================
  Files           3        3              
  Lines         235      223      -12     
==========================================
- Hits           83       81       -2     
+ Misses        152      142      -10     

Files with missing lines	Coverage Δ
lib/unitlib.g	91.02% <100.00%> (+9.91%)	⬆️

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[olexandr-konovalov]

Sounds good, but need to resolve merge conflict first

[olexandr-konovalov]

Let's write "of orders up to and including 243" here and remove the 1st paragraph of "Install" at all!

[olexandr-konovalov]

Let's write "of orders up to and including 243" above and remove this paragraph of "Install" at all!