PesaCheck UI | Fix | Some Pages Content Update

[RalphOwah]

Pick the contents from the ghost PesaCheck pages provided to replace the placeholder content we currently have in PesaCheck

1. Contact Us Page Content - https://pesacheck.org/contact-us/
2. Methodology Page Content - https://pesacheck.org/our-methodology/
3. Principles Page Content - https://pesacheck.org/our-principles/
4. Funding Page Content - https://pesacheck.org/our-principles/