CAL-57: Deploy library on Cocoapods

feat:
- Prepared library for cocoapods deploying
- Added License

Ticket: https://mijick.atlassian.net/browse/CAL-57

LICENSE

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+MIT License
+
+Copyright (c) 2023 Mijick
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

MijickCalendarView.podspec

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+Pod::Spec.new do |s|
+  s.name                  = 'MijickCalendarView'
+  s.summary               = 'Create fully customisable calendar in no time. Keep your code clean'
+  s.description           = <<-DESC
+    MijickCalendarView is a free and open-source library designed for SwiftUI that makes the process of creating calendars easier and much cleaner.
+                               DESC
+
+  s.version               = '1.0.0'
+  s.ios.deployment_target = '14.0'
+  s.osx.deployment_target = '11.0'
+  s.swift_version         = '5.0'
+
+  s.source_files          = 'Sources/**/*'
+  s.frameworks            = 'SwiftUI', 'Foundation', 'Combine'
+
+  s.homepage              = 'https://github.com/Mijick/CalendarView'
+  s.license               = { :type => 'MIT', :file => 'LICENSE' }
+  s.author                = { 'Tomasz Kurylik' => '[email protected]' }
+  s.source                = { :git => 'https://github.com/Mijick/CalendarView', :tag => s.version.to_s }
+end