docs: mission revamp — education-first identity, families + sponsorship kept

Intro + closing tagline now match the canonical mission (technology,
hands-on learning, entrepreneurship, science, real-world skills; beyond the
traditional classroom), with the family-together framing and sponsor-funded
journeys preserved. 'Boy Scouts meets Geek Squad' flavor line evolved to
'Part classroom, part workshop, part expedition.'

Siblings: spikersoft-angular#861, spikersoft-backend PR #756.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DoTHPhXe2qAAeQfs2itQb9

README.md

@@ -1,8 +1,8 @@
 # SpikerSoft Platform
 
-A travel-based assisted learning platform that fundraises for children's global exploration. SpikerSoft bridges outdoor adventure with modern technology -- structured education meets hands-on STEM, where families explore the world together and sponsors fund the journey.
+SpikerSoft exists to give students accessible education that expands their horizons — through technology, hands-on learning, entrepreneurship, science, and real-world skills — helping every student discover and develop their own interests and abilities beyond the limits of a traditional classroom. Families learn together — at home, on the road, or alongside school — and sponsors fund the students, the tools, and the journeys that turn learning into experience.
 
-Think Boy Scouts meets Geek Squad in the jungle.
+Part classroom, part workshop, part expedition.
 
 ## Platform Overview
 
@@ -2647,5 +2647,5 @@ Earlier text here referred to an “Academic License” and a single `LICENSE` a
 
 ---
 
-*Bringing families together through exploration -- bridging technology and the outdoors so every child can learn by doing, sponsor by caring, and grow by adventuring.*
+*Helping every student discover what moves them — with families learning together and sponsors funding the journey.*