Add extracted tools: CitrineOS, OpenOCPP, ShapeShifter

- CitrineOS core extracted (CSMS OCPP 2.0.1)
- OpenOCPP extracted (firmware OCPP 1.6J/2.0.1)
- ShapeShifter library installed (pip install -e)
- ShapeShifter specification extracted
- EVerest extracted

TODO updated with progress

tools/shapeshifter-specification-main/docs/general-description/index.md

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+<!--
+SPDX-FileCopyrightText: 2020-2023 Contributors to the Shapeshifter project
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
+# General description
+
+This chapter describes the global information flows for flexibility trading between AGR and DSO for grid contraint purposes.
+In this respect, UFTP acts as a subset of USEF’s market-based coordination mechanism (MCM), where AGR-DSO trading is an embedded part of the broader mechanism which applies to multiple flexibility services for all relevant market roles.
+In order to understand how UFTP is embedded in USEF, we have used some of USEF’s general concepts to describe the UFTP processes.
+For further information on these, please see ‘USEF: The Framework explained’ [^B1].
+Sections describe the interactions in the different Phases of MCM: [Contract](contract-phase.md), [Plan](plan-phase.md), [Validate](validate-phase.md), [Operate](operate-phase.md) and [Settle](settle-phase.md).
+
+[^B1]: USEF, "Flexibility Value Chain (update 2018)," 8 10 2018. [Online]. Available: [https://www.usef.energy/app/uploads/2018/11/USEF-White-paper-Flexibility-Value-Chain-2018-version-1.0_Oct18.pdf](https://www.usef.energy/app/uploads/2018/11/USEF-White-paper-Flexibility-Value-Chain-2018-version-1.0_Oct18.pdf).